On 28 October 1904 he married Katie Anna Regier (11 July 1881-30 December 1971) of Elbing. They had four children: Walter, Herbert (stillborn), Dorothea, and Gertrude.

Henry was ordained minister in 1909 and elder in 1914. For many years he served as itinerant minister in Kansas, Oklahoma, Colorado, and Texas, then as full-time minister of the Zion Church at Elbing, Kansas (1920-1951). His preaching was irenic, Bible-centered, and characterized by a warm spirituality. He was a charter member of Herald Publishing Co. (1920, Newton, Kansas), serving as board member for 50 years, and was a member of the board of Bethel Deaconess Hospital (Newton, Kansas, USA) for 35 years (1927-1962). Henry and Katie Dyck undertook a spiritual ministry to refugees in Europe under Mennonite Central Committee auspices, 1949-1950. In later years he wrote ca. 150 "Messages for the Heart" in the Mennonite Weekly Review and remained in continuing demand as a supply preacher until the week of his death on 26 July 1970.